MX2014006540A

MX2014006540A - Systems and methods for controlling a variable speed water pump.

Info

Publication number: MX2014006540A
Application number: MX2014006540A
Authority: MX
Inventors: Tristan Pyle; René M P A Nevels
Original assignee: Paccar Inc
Priority date: 2011-12-01
Filing date: 2012-11-30
Publication date: 2014-07-09
Also published as: EP3211194B1; US20130142669A1; EP3211194A1; AU2017201730B2; CA2854196A1; US20190136742A1; EP2785995A1; CA3115473A1; EP2785995A4; AU2012345840A1; CA3055603A1; CA3055603C; AU2017201730A1; US10119453B2; EP2785995B1; CA2854196C; AU2019204467B2; AU2012345840B2; US9416720B2; WO2013082400A1

Abstract

Systems and methods for providing an improved strategy for controlling a variable speed water pump in a vehicle. In some embodiments, more than one water pump speed function is calculated based on values obtained from vehicle sensors, and a controller chooses among the water pump speed function results to set a water pump speed. In some embodiments, the water pump speed is increased when driveline torque is greater than a threshold amount for an amount of time that varies based on the driveline torque. In some embodiments, ambient temperature is considered while determining whether the water pump should provide full coolant flow to an auxiliary coolant loop of a trailer.

Description

SYSTEMS AND METHODS TO CONTROL A WATER PUMP OF VARIABLE SPEED BACKGROUND Traditional internal combustion engines include a cooling system in which water (or other cooling) is fed through the engine block and then through a radiator by a water pump to dissipate excess heat and to maintain the engine temperature to an acceptable level. A traditional water pump can be sized to consistently provide a level of cooling flow that is suitable for the maximum operating conditions. Variable speed water pumps can be used to reduce parasitic losses on the motor caused by the water pump when less than the maximum cooling flow level is needed to keep the engine temperature within acceptable levels.

Although variable speed water pumps are known in general, what is needed is a variable speed water pump that is configured to respond to parameters other than the engine oil temperature or the cooling temperature in the determination of a control strategy.

SHORT DESCRIPTION This brief description is presented to introduce a selection of concepts in a simplified form which is described later in the detailed description. This brief description is not intended to identify the key features of the subject matter claimed, nor is it intended to be used as an aid in determining the scope of the subject matter claimed.

In some embodiments, a vehicle is provided. The vehicle comprises a first cooling circuit configured to cool a motor, an auxiliary cooling circuit configured to control a temperature of at least one auxiliary component, a variable speed pump configured to pump fluid through the first cooling circuit and the circuit auxiliary cooling, and a pump controller. The pump controller is configured to make the variable speed pump operate at variable speed when a measurement of the Ambient temperature meets a predetermined criteria, and to cause the variable speed pump to operate at full speed when a measurement of the ambient temperature does not meet the predetermined criteria.

In some embodiments, a method is provided for controlling a speed of a variable speed pump configured to provide cooling flow to a gearbox cooler. The method comprises tracking a quantity of transmission torsional force produced by a vehicle, and, in response to the determination that the amount of transmission torque has exceeded a threshold amount of torsional torque of less a threshold amount of time, varying the pump speed based on the amount of transmission torque.

In some embodiments, a method for controlling a speed of a pump configured to provide a cooling flow is provided. A set of sensor values is received from a plurality of sensors. More than one speed control function is executed on the basis of the set of sensor values to generate a set of speed control values associated with the speed control functions. A speed control value is selected between the set of speed control values, and the pump is caused to operate in accordance with the selected speed control value.

DESCRIPTION OF THE DRAWINGS The above aspects and many of the concomitant advantages of this invention will be more readily appreciated as understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein: Fig. 1 is a block diagram illustrating one embodiment of a water pump management system according to various aspects of the present disclosure; Figure 2 illustrates an exemplary hardware architecture of a computer device suitable for use with embodiments of the present disclosure; Figure 3 illustrates one embodiment of a method of controlling a variable speed water pump according to various aspects of the present disclosure; Figure 4 is a graph illustrating the percentage of coupling against the cooling temperature as can be used by various embodiments of the present disclosure; Figure 5 illustrates one embodiment of a method that calculates an exemplary water pump speed function in accordance with various aspects of the present disclosure; Figures 6A and 6B are graphs illustrating the fan speed versus ambient temperature and the cooling temperature suitable for use with the modalities of the method illustrated in Figure 5; Y Figures 7A and 7B illustrate one embodiment of a method that calculates an exemplary water pump speed function that returns a result value associated with the transmission torque in accordance with various aspects of the present disclosure.

DETAILED DESCRIPTION The detailed description set forth below in connection with the accompanying drawings, wherein the same numbers refer to like elements is intended as a description of various embodiments of the disclosed subject matter and is not intended to represent the only embodiments. Each modality described in this description is provided merely as an example or illustration and should not be interpreted as being preferred or favorable over other modalities. Illustrative examples provided In this document they are not intended to be exhaustive or limit the disclosure to the precise forms described. Likewise, the steps described in this document may be interchangeable with other steps, or combinations of steps, in order to achieve the same or substantially similar result.

GENERAL DESCRIPTION OF THE SYSTEM Fig. 1 is a block diagram illustrating one embodiment of a water pump management system 100 in accordance with various aspects of the present disclosure. As illustrated, the system 100 is included within a vehicle 102 having an internal combustion engine, such as a car, a truck, and / or the like. The vehicle 102 includes many features known to one of ordinary skill in the art included in a vehicle 102, such as a motor, an operator compartment, a fuel tank, a transmission, and so forth.

The illustrated vehicle 102 includes a variable speed water pump 110. The water pump 110 is connected to a motor cooling circuit 112 by a cooling supply line 128 and a cooling return line 126. The cooling circuit The motor 112 transfers the heat from the motor to the cooling liquid, thus reducing the motor temperature. The water pump 110 is also connected to a radiator 107 through a cooling supply line 134, a temperature-dependent valve such as a thermostat 106, a cooling supply line 135, and a refrigeration return line. 136. The radiator 107 is configured to transfer heat from the cooling to the surrounding environment, thereby reducing the cooling temperature.

The thermostat 106 is configured to interrupt or otherwise limit the cooling flow from the water pump 110 to the radiator 107 until the cooling liquid reaches a threshold temperature. Once the cooling reaches the threshold temperature, the thermostat 106 allows a total flow of cooling liquid in the radiator 107. 106 The thermostat can limit the flow of cooling at low temperature to limit the cooling of the engine until the engine reaches a temperature minimum efficient operation. Before this operating temperature is reached, the cooling liquid is heated inside the cooling circuit of the motor 112 without being cooled inside the radiator 107.

In some embodiments, the water pump 110 may also be connected to one or more of additional cooling circuits 114 by at least one cooling supply line 130 and at least one cooling return line 124. Additional cooling circuits 114 they can be used to heat or cool various components of the vehicle. As an example, additional refrigeration circuits 114 may be provided in a urea tank or fuel tank in order to increase the urea or fuel temperature to ideal levels despite low ambient temperatures. As another example, additional refrigeration circuits 114 can be used to provide heat from the engine to an air conditioning system in order to heat the operator compartment. In these embodiments, for example, the hot cooler of the engine cooling circuit 112 can be selectively routed to the urea tank, fuel tank, heater core, and / or the like. From the heating device, the cooler returns to the water of the pump 110. As another example, the additional cooling circuits 114 can be used to cool a gearbox, retarder or brake components. In this embodiment, the radiator cold cooler 107 can be routed selectively to gearboxes, retarder, brake components, and / or the like. From the cooling device, the cooling returns to the water pump 110.

In some embodiments, the vehicle 102 may be coupled to a trailer 116. In such embodiments, the trailer 116 may include at least one auxiliary cooling circuit 120 which is selectively connected to the water pump 110 through a power supply line. cooling 122 and return line of the cooler 132. A variety of auxiliary cooling circuits 120 can be used in embodiments of the present disclosure, such as an auxiliary cooling circuit used to cool an engine that drives a trailer cooling unit, a auxiliary cooling circuit used to heat the valves in a trailer milk distribution, and / or the like.

One of ordinary skill in the art will recognize that the vehicle 102 may include components connected by cooling supply lines and / or cooling return lines in a different manner than that shown in Figure 1. For example, in some embodiments, the line cooling supply 135 can include other cooling lines, such as the cooling supply line 128, and at least one segment of cooling return line 126. As another example, in some embodiments, the cooler may be supplied to one or more cooling circuits, such as the engine cooling circuit 112, the radiator 107, and one or more additional cooling circuits 114, before returning to the water pump 110. Each of the examples described is by way of example only, and a person skilled in the art will recognize that other configurations are possible without departing from the scope of the present disclosure.

The modes of the vehicle 102 also include a water pump controller 104. The water pump controller 104 is communicatively coupled to the water pump 110, and instructs the water pump 110 to operate at a certain speed by the water pump controller 104. The water pump controller 104 may be communicatively coupled to the thermostat 106, one or more sensors of the vehicle 108, and one or more auxiliary sensors 118, to collect information on which to base the determination of the operating speed of the water pump. This determination is discussed later. One or more vehicle sensors 108 and one or more auxiliary sensors 118 may include, but are not limited to, the temperature sensors of refrigeration, sensors of room temperature, sensors of state of the vehicle, and / or similars.

In one embodiment, the water pump controller 104 is provided in a separate physical component of the water pump 110, such as in an engine control module (ECM) and / or the like. In another embodiment, the water pump controller 104 may be provided within the water pump 110. In some embodiments, the water pump controller 104 may include a digital computing device that receives data from the thermostat 106 and the sensors 108, 118, and process the data to determine the operating speed of the water pump. In some embodiments, the water pump controller 104 may include physical detection devices or calculation devices that contribute to the determination of the speed of the water or analog pump.

In some embodiments, the water pump controller 104 may be, may include, or may be a part of one or more computing devices. Figure 2 illustrates an exemplary hardware architecture of a computing device 200 suitable for use with embodiments of the present disclosure. Ordinary technicians in the field and others will recognize that the computer device 200 can be any one of any number of devices currently available or yet to be developed. In its most basic configuration, the computing device 200 includes at least one processor 202 and a system memory 204 connected by a communication bus 206. Depending on the exact configuration and the type of device, the system memory 204 may be volatile memory. or non-volatile, such as read-only memory ("ROM"), random access memory ("RAM"), EEPROM, flash memory, or similar memory technology. Those of ordinary skill in the art and others will recognize that system memory 204 typically stores data and / or program modules that are immediately accessible and / or currently operated by processor 202. In this regard, processor 202 serves as a center calculation of the calculation device 200 by supporting the execution of instructions.

As further illustrated in Figure 2, the computing device 200 may include a network interface 210 comprising one or more components for communication with other devices through a network. The embodiments of the present disclosure can access the basic services using the network interface 210 to carry out communications using common network protocols, such as TCP / IP, UDP, USB, Firewire, and / or Similar. In some embodiments, the network may include a communications network throughout the vehicle implemented using any number of different communication protocols such as, but not limited to, Automotive Engineers' ("SAE") J1587, SAE J1922, SAE J1939, SAE J1708, and combinations thereof.

In the embodiment example depicted in Figure 2, the computing device 200 also includes a storage means 208. However, the services can be accessed using a computing device that does not include means for storing the data to a local storage medium. . Therefore, the storage medium 208 shown in Figure 2 is represented by a broken line to indicate that the storage means 208 is optional. In any case, the storage medium 208 may be volatile or non-volatile, removable or non-removable, implemented using any technology capable of storing information such as, but not limited to, a hard disk, solid state drive, CD-ROM, DVD, or other storage disk, magnetic cassettes, magnetic tape, magnetic disk storage, and the like.

As used herein, the term "computer-readable media" includes non-removable and non-removable volatile and non-volatile media implemented in any procedure or technology capable of storing information, such as computer-readable instructions, data structures, program modules, or other data. In this regard, the system memory 204 and storage means 208 shown in Figure 2 are merely examples of computer readable media.

Suitable implementations of computing devices including a processor 202, system memory 204, communication bus 206, storage medium 208, and network interface 210 are known and commercially available. To facilitate the illustration and because it is not important for the understanding of the subject matter claimed, Figure 2 does not show some of the typical components of many computing devices.

In this regard, the computing device 200 may include one or more input devices. Similarly, the computing device 200 can also include one or more output devices.

CONTROL OF A VARIABLE SPEED WATER PUMP Figure 3 illustrates one embodiment of a method 300 for controlling a variable speed water pump according to various aspects of the present disclosure. From a start block, method 300 passes to the block 302, where a water pump controller 104 establishes a speed of a water pump 110 at a minimum speed. Method 300 then passes to a continuation terminal ("terminal A"), and then to the block 304, wherein the water pump controller 104 determines whether a thermostat 106 is fully engaged. In some embodiments, the thermostat 106 is configured to monitor the cooling temperature within the engine cooling circuit 112. As the cooling temperature within the engine cooling circuit 112 rises, the thermostat 106 becomes more engaged, and allows more cooling to flow to the radiator 107. Once the cooling is raised to a predetermined temperature, the thermostat 106 will be fully engaged and allow a maximum amount of cooling to flow to the radiator 107.

In decision block 306, if the response to the determination made in block 304 is NO, method 300 returns to terminal A, and repeats the determination until the response to the determination is YES. In decision block 306, if the response to the determination made in block 306 is YES, method 300 goes to block 308.

In block 308, the water pump controller 104 calculates a set of result values of one or more speed functions of the water pump, each result value based on one or more values of the sensors such as a stated temperature. of a component of the vehicle, an indicated ambient temperature, and / or the like. Each result value may be based on other factors, as well as result values previously calculated for the same or other functions, a determination of whether a sensor value is increasing or decreasing, and / or the like. Several exemplary speed functions of the water pump suitable for use in embodiments of the present disclosure will be discussed below.

Next, in block 310, the water pump controller 104 chooses a result value from the set of result values, and adjusts the speed of the water pump 110 to the value of the chosen result. The water pump controller 104 may use any appropriate means to choose a result value from the set of result values. In one embodiment, the water pump controller 104 may choose a higher result value from the set of result values to ensure that the calculated larger fluid flow requirement is met, although any other method suitable for the choice of a result value can used in other modalities, such as choosing the value of the result of a particular function when detecting a particular vehicle state, and / or the like.

The method 300 then passes to a decision block 312, where a determination is made as to whether the method 300 should continue. In most cases, if the vehicle 102 continues to operate, the determination in decision block 312 will be that method 300 must continue. Otherwise, if the vehicle 102 is closing, the determination may be that method 300 should not continue. If the determination in decision block 312 is YES, then method 300 returns to terminal A. If the determination in decision block 312 is NO, then method 300 goes to a final block and ends.

SPEED OF THE PUMP DUE TO THE TEMPERATURE OF REFRIGERATION Figure 4 is a graph 400 illustrating the percentage of coupling against the cooling temperature as can be used by various embodiments of the present disclosure. Figure 400 shows the effects of an example water pump speed function that has a result value that increases as the cooling temperature increases. A person with ordinary skill in the art will realize that this is only a function of the speed of the exemplary water pump, and that other speed functions of the water pump, among them several described below, can be used. .

Graph 400 illustrates the cooling temperature on the X axis, and a percentage on the Y axis. With respect to the solid line, the Y axis indicates a percentage of a maximum speed of the water pump. With respect to the dashed line, the Y axis indicates a percentage of thermostat coupling. When the cooling temperature is at a minimum, the thermostat is decoupled to the maximum, and the speed of the water pump is maintained at a minimum speed of the water pump 401. As the cooling temperature rises, the thermostat coupling increases , until the cooling temperature reaches a complete thermostat temperature coupling 402. Once the full coupling temperature thermostat 402 is reached, the speed of the water pump can be increased, as discussed above with respect to the figure 3.

As the cooling temperature continues to rise above the temperature of the thermostat involving 402, an increase of the Temperature water pump speed 404 will be reached. As the cooling temperature rises above the temperature of increase of the speed of the water pump 404, the value of the result of the speed function of the water pump is also raised. In some embodiments, the value of the result of the speed function of the water pump can increase linearly at a maximum speed of the water pump 408. In the embodiment illustrated, the value of the speed function result of the Water pump is linearly increased until a maximum temperature of the water pump 406 is reached, at which time the value of the result jumps at a maximum speed of the water pump 408.

In the illustrated mode, the hysteresis is used to prevent either the thermostat or the cycle water pump once a maximum coupling percentage is reached. After the cooling temperature rises beyond the maximum temperature of the water pump 406, the speed of the water pump will be maintained at the maximum speed of the water pump 408 until the cooling temperature drops to a hysteresis temperature water pump 410, at which time the linear portion of the water pump The speed function will be applied again. Similarly, after of the cooling temperature rises beyond the temperature of the complete coupling thermostat 402, the thermostat 106 will remain fully engaged until the cooling temperature drops to a thermostat hysteresis temperature 412, at which point the thermostat coupling will drop along with the temperature of refrigeration.

Although Figure 4 illustrates the speed of the water pump calculated as a function of the cooling temperature, in some embodiments, the similar water pump speed functions can calculate water pump speed as a function of other water pump measurements. temperature, such as fuel temperature, urea temperature, oil temperature gearbox, oil temperature retarder, and / or the like. Each of these functions can be similar to the function illustrated in Figure 4, and any or all of these functions can use different temperatures increasing the speed of the water pump, maximum temperatures increasing the speed of the water pump, hysteresis water pump temperatures, and / or the like.

SPEED OF THE PUMP DEPENDING ON HVAC CONFIGURATION Figure 5 illustrates a method 500 that calculates another speed function of the exemplary water pump according to various aspects of the present disclosure. Unlike the previously illustrated function of the figure 4, the 500 method uses data obtained from more than one vehicle sensor, and contains a greater amount of logic. Generally described, method 500 bases a result of the speed function of the water pump if a vehicle operator is running a heater for the operator's compartment. If so, method 500 bases the result on heater settings, and can provide more heat from the engine to the heater when necessary.

From a start block, method 500 goes to block 502, where the water pump controller 104 determines whether the heat of an air conditioning system is requested. The water pump controller 104 may be communicatively coupled to a vehicle sensor 108 that reports the configuration of the air conditioning system. One of ordinary skill in the art will appreciate that the vehicle sensor 108 may be a part of the air conditioning system, and that the water pump controller 104 may be communicatively coupled to the vehicle sensor 108 through the HVAC system. In decision block 504, a test based on the determination of whether the heat of the HVAC system has been requested.

In one embodiment, if the response to the test in decision block 504 is NO, then method 500 goes to block 506, where the water pump controller 104 returns a minimum water pump speed as a value of the result of the speed function of the water pump. The minimum speed of the water pump is returned so that, when the water pump controller 104 is to choose a result value as in block 310 discussed above, the water pump speed function related to HVAC does not contribute to increase the speed of the water pump above its minimum speed if heat is not requested from the HVAC system. In other embodiments, the method 500 may indicate that the value of the result of the method 500 should not contribute to the determination of the speed of the water pump in any other way, such as the establishment of a flag, returning a value of zero or zero, and / or similar.

The procedure 500 then proceeds to a final block and ends. One of ordinary skill in the art will understand that although method 500 is illustrated as ending in the final block, in some embodiments, method 500 may be executed more than once, such as in a repetitive, circuit manner, and / or similar, once the Method 500 reaches the end block.

Otherwise, if the response to the test in decision block 504 is YES, the method continues in block 508, where the water pump controller 104 determines whether the fan speed is greater than a threshold percentage. . Similar to the previous discussion, the water pump controller 104 can obtain the fan speed of a vehicle sensor 108 coupled to a part of the HVAC system. The threshold percentage can be stored in the water pump controller 104, or it can be recovered by the water pump controller 104 from a storage medium. An operator may be able to change the threshold percentage to obtain different performance characteristics.

In decision block 510, a test is performed based on the result of the determination made in block 508 of whether the fan speed is greater than the threshold percentage. If the response to the test in decision block 510 is YES, method 500 goes to block 512, where the water pump controller 104 calculates a result value based on a first function of the cooling temperature. and the ambient temperature. If the response to the test in decision block 510 is NO, method 500 goes to block 514, where the water pump controller 104 calculates a Result value based on a second function of the cooling temperature and the ambient temperature. In other words, the water pump controller 104 uses a different function to calculate the value of the result if the fan is set at a high speed (more heat is desired in the steering compartment) than if the fan is adjusted to a low speed As discussed above, the cooling temperature and the ambient temperature can be obtained from one or more vehicle sensors 108.

After block 506, 512 or 514, method 500 proceeds to decision block 516, where a determination is made as to whether method 500 should continue. In most cases, if the vehicle 102 continues to operate, the determination in decision block 516 will be that method 500 must continue. Otherwise, if the vehicle 102 is closing, the determination may be that the 500 method should not continue. If the determination in decision block 516 is YES, then method 500 returns to block 502. If the determination in decision block 516 is NO, then method 500 passes to a final block and ends.

The first function and the second function can include similar calculations, or they can be very different.

For example, Figure 6A illustrates a modality of a first function, and Figure 6B illustrates a second function mode, for a mode in which the threshold percentage is 50% of the maximum fan speed. The first function will be used when the air conditioning fan is set at a high speed, such as when an operator wants the operator's compartment to heat up quickly, or when the room temperature is particularly low. Conversely, the second function will be used when the air conditioning fan is set at a low speed, such as when the operator is not requesting much heat from the HVAC system.

For the first function is illustrated in Figure 6A, the return value will be higher when the ambient temperature is low, reflecting the need for additional heating capacity to improve the comfort of the compartment operator. If the ambient temperature is low, but the cooling temperature is also low, the return value is not that high, since the cooler will not be as effective in providing heat to the HVAC system until its temperature increases. If the ambient temperature is high, the return value will remain low. For the second function is illustrated in Figure 6B, the return value is constantly kept low, regardless of the ambient temperature or the cooling temperature. A typical technician in the art will recognize that, in other modalities, other functions may be used. In one mode, the return values of each function can be stored on a computer-readable medium in a lookup table. In another modality, the return values of each function can be specified by the mathematical logic.

SPEED OF THE PUMP IN FUNCTION DAY TORQUE OF TORQUE OF TRANSMISSION Figures 7A 7B collectively illustrate a mode of a water pump speed function that returns a result value associated with transmission torque. Such a speed function of the water pump may be useful in a vehicle 102 in which the water pump 110 provides cooling to a transmission or gearbox cooler. In general terms, the speed function of the water pump is illustrated in Figures 7A 7B can be used to increase the speed of the water pump when the transmission torque force is greater than a threshold value for a time threshold amount. The amount of time threshold may vary depending on the amount of torque that is currently generated. For example, the amount of threshold of time may be less when the amount of torsional force is higher, so that a delay before increasing the speed of the water pump is reduced under more extreme operating conditions.

As discussed above, the transmission torsion force can be obtained by a vehicle sensor 108 associated with the transmission line. In some embodiments, the transmission torque force can be obtained from an engine control unit that controls such values, and is transmitted to the water pump controller 104 through a vehicle bus. In some embodiments, an absolute value of the transmission torque can be used, so that the water pump 110 will provide the additional cooling flow to the gearbox cooler, both when the engine is providing a high force from torsion to transmission and during engine braking conditions. In some embodiments, the time delay may be measured by the water pump controller 104 initiating a timer once a violation of the threshold transmission torque force is detected.

Figure 7A illustrates a plot 700 of time delay compared to the torsion force according to various aspects of the present disclosure. When the Transmission torsional force is below a trigger torque threshold 701, it can not be desired for the speed function of the water pump present to affect the speed of the water pump 110. Accordingly, when the transmission torque force is below the activation torque threshold 701, there may be no value for the delay time. Once the transmission torque force is raised above the activation threshold of the torsional force 701, the time delay 702 will be used until the transmission torque increases above a lower torque threshold 704. In other words, when the transmission torque force is in a relatively low range between the threshold activation torque of 701 and the lower torque force threshold 704, the time delay 702 will be used so that the speed function of the present water pump will wait a relatively long time before it affects the speed of the water pump 110.

Once the transmission torque is raised above the lower torque threshold 704, the time delay decreases as a function of the transmission torque, until the transmission torque reaches a force threshold. Torsion Torque 706. Once the force of Transmission torque rises above the upper torque force threshold 706, a low delay time 708 is used. In other words, as the transmission increases the torsional force and the pressure on the transmission or gearbox increases, a shorter delay time will be used before the function of the current speed of the water pump affects the speed of the water pump 110. Above the upper torsion force threshold 706, a consistent low time delay 708 is used to ensure that the speed function of the water pump present will quickly affect the speed of the water pump 110.

Figure 7B illustrates a graph 750 of the speed of the water pump compared to the torsional force according to various aspects of the present disclosure. In some embodiments, after the delay time described with respect to Figure 7A has been reached, the function illustrated in Figure 7B is used to return a velocity value of the water pump.

As discussed above, in some embodiments, the torsional torsional force illustrated in the graph 750 may be an absolute value of torsional force transmission so that the effects of the function can be served both during high force conditions of torque twisting applied by the engine and during conditions of engine braking. At relatively low values of torsional force, a low speed of the water pump 752 can be returned. Once torque transmission is raised above a lower torque threshold 754, the return value will increase until a higher torque force threshold 756 is reached, at which time the maximum speed of water pump 758 may be returned As in the previous discussion, since the torsional force falls by transmission, the maximum speed of the water pump 758 can be maintained as a return value until a water pump hysteresis motor torque force 760 is reached, to prevent the bicycle water pump.

PUMP SPEED BASED ON TRAILER REFRIGERATION CIRCUITS In some embodiments, the set points defined by the operator can be used to activate or deactivate the variability of the water pump 110 under certain conditions. For example, in a system 100 that includes a trailer 116 and an auxiliary cooling circuit 120 associated with the trailer 116, an operator may choose to sacrifice the fuel economy gain of a variable speed water pump 110 in order to have a cooling flow for the complete auxiliary cooling circuit 120 under certain conditions. For example, if the auxiliary cooling circuit 120 cools an engine in a cooling unit, it may be important that the auxiliary cooling circuit 120 receives the full cooling flow if the ambient temperature is particularly high. As another example, if the auxiliary cooling circuit 120 heats valves in a milk distribution trailer, it may be important that the auxiliary cooling circuit 120 receives the full cooling flow if the ambient temperature is particularly low.

Accordingly, in some embodiments, the water pump controller 104 may compare an ambient temperature received from a vehicle sensor 108 to one or more setpoint temperatures, and may adjust the water pump 110 to operate at full speed if the Ambient temperature is not in a range indicate the setpoint temperatures. For example, if the auxiliary cooling circuit 120 heats the valves in a milk distribution trailer, a set temperature can be set to 0.0000 degrees Celsius. If the ambient temperature falls below the setpoint temperature, the water pump controller 104 can adjust the water pump 110 to run at full speed. If the room temperature is above the setpoint temperature, the water pump controller 104 may use one or more methods, including the methods described above, to determine the speed of the variable speed water pump 110.

As another example, if the auxiliary cooling circuit 120 is cooled by a motor in a cooling device, a setpoint temperature can be set at 22.2222 degrees Celsius. If the room temperature rises above the setpoint temperature, the water pump controller 104 can adjust the water pump 110 to run at full speed. If the ambient temperature is lower than the setpoint temperature, the water pump controller 104 may use one or more methods, including the methods described above, to determine the speed of the variable speed water pump 110.

As indicated above, one or more adjustment points may be used. For example, both a high reference value and a low set point can be used. In some such embodiments, the water pump 110 is operated at a variable speed when the ambient temperature is located between the set points, and would be operated at full speed if the temperature environment is not among the set points. In other such modalities, the water pump 110 is operated at a full speed when the ambient temperature is located between the set points, and would be operated at a variable speed if the ambient temperature is not between the set points. In some embodiments, the water pump 110 can also be set at full speed if the ambient temperature is located between the two set points and a power take-off of the device is occupied. In some embodiments, the water pump 110 may be configured for full speed if the ambient temperature is located between the two adjustment points and a power take-off of the device is occupied.

As will be appreciated by skilled in the art, the specific routines described above in the flowcharts may represent or more of any number of processing strategies, such as triggered events, triggered interruption, multi-tasking, multi-threaded and the like. . As such, various illustrated acts or functions can be carried out in the sequence illustrated, in parallel, or in some cases omitted. Similarly, the order of processing is not required to necessarily achieve the features and benefits, but it is provided to facilitate illustration and description. Although I do not know Explicitly illustrates, or more of the acts or functions described can be performed several times depending on the strategy being used. In addition, these figures can graphically represent code to be programmed in a computer-readable storage medium associated with a computing device.

Although the illustrative modalities have been illustrated and described, it will be appreciated that several changes can be made therein without departing from the object and scope of the invention as claimed.

Claims

1. A vehicle that consists of: a first cooling circuit configured to cool a motor; an auxiliary cooling circuit configured to control the temperature of at least one auxiliary component; a variable speed pump configured to pump the fluid through the first auxiliary cooling circuit and the auxiliary cooling circuit; Y a pump controller configured to: causing the variable speed pump to operate at a variable speed when a measurement of ambient temperature meets a predetermined criterion; Y make the variable speed pump operate at a maximum speed when a measurement of ambient temperature does not meet the predetermined criteria.

2. The vehicle according to claim 1, characterized in that the vehicle includes a trailer, and wherein at least one auxiliary component is in the trailer.

3. The vehicle according to claim 2, characterized in that at least one auxiliary component includes a cooling unit.

4. The vehicle according to any of claims 2 to 3, characterized in that at least one auxiliary component includes a thermal valve.

5. The vehicle according to any one of claims 1 to 4, characterized in that the predetermined criteria include a low temperature threshold, and wherein the ambient temperature measurement meets the predetermined criteria when the measurement of the ambient temperature is greater than the threshold of low temperature.

6. The vehicle according to any of claims 1 to 5, characterized in that the predetermined criteria include a high temperature threshold, and wherein the ambient temperature measurement meets the predetermined criteria when the measurement of ambient temperature is below the temperature threshold high .

7. The vehicle according to any of claims 1 to 6, characterized in that the vehicle includes a PTO mechanism, and wherein the pump controller is further configured to cause the variable speed pump to run at full speed when the PTO mechanism engages.

8. The vehicle according to claims 1 to 7, characterized in that the criteria Defaults include at least one temperature threshold that is configurable by the operator.

9. A method for controlling the speed of the variable speed pump configured to provide cooling flow to the gearbox cooler, the method consisting of: monitor an amount of the transmission torque force produced by a vehicle; Y in response to the determination that the amount of the driving torque has exceeded a limiting amount of the torsional force for at least an amount of time limit, the variation of the pump speed based on the amount of the force of transmission torsion.

10. The method according to claim 9, further comprising determining the amount of time limit based on the amount of transmission torque.

11. The method according to claim 10, characterized in that the amount of time limit decreases as the amount of transmission torque increases.

12. The method according to claim 10, characterized in that the amount of time limit is a first value when the amount of Transmission torsional force is above an activation torque limit and below a lower torque limit, where the amount of time limit decreases as the amount of transmission torque increases between the lower torque limit and a higher torque limit, and wherein the amount of time limit is a second value when the amount of the transmission torque is above the upper torque limit.

13. The method according to any of claims 9-12, characterized in that the monitored amount of transmission torsional force is an absolute value of the transmission torsional force produced by the vehicle.

1 . The method according to any of claims 9-13, characterized in that the variation of the pump speed based on the amount of transmission torsional force includes the use of a hysteresis value to avoid the pump cycle.

15. A method for controlling a speed of a pump configured to provide a cooling flow, the method comprising: receiving a set of values from the sensors of a plurality of sensors; execute more than one speed control function based on the set of sensor values to generate a set of speed control values associated with the speed control functions; selecting a speed control value from the set of speed control values; Y make the pump operate according to the selected speed control value.

16. The method according to claim 15, characterized in that the selection of a speed control value from the set of speed control values includes the selection of a maximum value of speed control from the set of speed control values.

17. The method according to any of claims 15-16, characterized in that more than one speed control function includes a speed control function that compares an ambient temperature value to a low ambient temperature threshold and a room temperature threshold elevated

18. The method according to claim 17, characterized in that the execution of the speed control function includes: determine if the ambient temperature value is between the low ambient temperature threshold and the high ambient temperature threshold; in response to determining that the value of the ambient temperature is between the low ambient temperature threshold and the high ambient temperature threshold, 5. by returning a first speed control value as a result of the speed control function; Y in response to determining that the value of the ambient temperature is not between the low ambient temperature threshold and the high ambient temperature threshold, 0 by returning a second speed control value different from the first speed control value than the result of the speed control function.

19. The method according to any of claims 15-18, characterized in that the set of values of the sensors include a transmission torque value, and wherein more than one speed control function includes a control function of speed determining whether the transmission torque value has been greater than a threshold torque value 0 for a predetermined amount of time.

20. The method according to any of claims 15-19, characterized in that more than one speed control function includes: 5 a speed control function that determines a speed control value based on a refrigeration temperature, room temperature, HVAC fan speed, and a heat request; a speed control function that determines a speed control value based on a transmission torque value; a speed control function that determines a speed control value based on a fuel temperature value; a speed control function that determines a speed control value based on a temperature value of the urea; a speed control function that determines a speed control value based on an oil temperature value of the gearbox; Y a speed control function that determines a speed control value based on a temperature value of the retarder oil.